Liquid discharge appliance



F, A CAMPBELL LIQUID DISCHARGE APPLIANCE Filed sept. 27, 1941 5sheets-sheet 1 www Freefo-k Nom Campbell Oef. l2, 1943. F, A CAMPBELL2,331,373

LIQUID DISCHARGE APPLIANQE yFiled sepi. 2v, 1941 s sheets-sheet 2Fredelck Alon @um pbe Il.

'NW-Nvo@ (L @WML Oct. 12? 1.943. F. A. CAMPBELL 2,331,373

LIQUID DISCHARGE APIILIANCE Filed Sept. 27, 1941 5 Sheets-Sheet 3Freden'ck QnCampbeH .INVENTora ou. 12, 1943. A, CAMPBELL `2,331,373

LIQUID DISCHARGE APPLIANCE Filed sept. 27, 1941 5 sneet's-sheet 4winx-rota (5,1 (Wk.

Of- 12 1943. F. A. CAMPBELL LIQUID DISCHARGE APPLIANCE Filed Sept. 27,1941 -5 Sheets-Sheet 5 Patented Oct. 1.2, 1943 LIQUID DISCHARGEAPPLIANCE Frederick Alan Campbell, Langley, England, as- `signor ofone-half to Fisher & Ludlow Limited,

Birmingham, England Application September 27, 1941, Serial No. 412,591In Greatl Britain November 22, ,1940

z claims; (c1. 299-57) This invention relates to a liquid dischargeappliance of the kind wherein the liquid passes through a plurality oftubes which can be extended telescopically by hydraulic pressure.

The appliancev is primarily intended for lfirefighting but it can beused for horticultural purposes or fory spraying buildings.

The object of the present invention is to provide a formof apparatusvwhereby a discharge of liquid at a high level can be obtained in aminimum of time and with a minimum of effort.

A further object of the present invention is to provide a device whichcan be cheaplyV manufactured and assembled mainly from lengths ofstandard section tube.

Referring to the drawing:

Figure l is a view in side elevation showing one form of the apparatuswith the liquid discharge tubes in their contracted and loweredposition. I

Figure 2 is a plan view.

Figure 3 is a view in side elevation showing the liquid discharge tubesin the contractedbut raised position.

Figure 4 is a sectional`view on line 4-4 of Figure 3.

Figures 5 and 5A constitute a view in section taken through themainvliquid discharge tubes showing them in the contracted position.

Figure 6 is a sectional view showing one end of the primary tube and theadjacent end of the secondary tube engaging therein in the extendedposition.

In the construction illustratedthe liquid discharge appliance 4is shownmounted upon the upwardly therefrom `is a bracket rcomprising twovertical members I6 suitably secured at the base and two inclinedmembersv |.1 secured to thebase at I8. Each member` I6( is secured toone of' the members |1 at. the top by welding. V e l i A cradleconsisting of fourA channel section members 20, 2|, 22 and 23 andaconn'ecting tube 35 is pivoted on the cross shaft I9 which passesthrough bearings on the upper ends of -the members I6. Furthenvobliquestays 24 'extend between the tube 3 5 and-the end of.' the member remotefrom thel tube 35 andfurther oblique stays extend betWee'nthe-tube 35-'and the Vend of the member 22 lwhich is remote fromf'the tube 35. 1 Y.j

The fourl members 2|), 2|, 22 'and 23 fare' `all of channel section andthe stays 24 and 25 may be of anglel sectionor any other section thatmay be desired.

end of the strut member is flxeda nut 29 v in r t which screws arotatable strut member 30 ha v` ing-a head 3|.1 f

"The lower endof thestrutmember 30 carries a bevel wheell 32 which isengaged by beveliwheels 33vmounted on the operating vshaft 34 providedon the vehicle. v f f 'n 1 On the upper surface of the vehicleltwovangle section members 36 are provided. These extend across the chassisframe and they carry two pairs |2 pivoted on a horizontal axis as shownat I3. y

In the construction shown the frontr'axle 92 of the vehicle isassociated with a forecarriage 93 having a turntable 94 so that theforecarriage can turn relatively to the vehicle frame.

The element I2 is provided with a pair of bars 95 pivoted on butt hinges95.

i foldable into the positions shown in chain dot lines or they can bemoved forwardly to the position shown in full lines. These bars are foruse in manoeuvering the vehicle manually after it has been detached fromthe tractor vehicle.

At the rear part of the vehicle'and projecting lis 'I'hese bars are iisof bearings 31 in which the shaft 34 can rotate.

Pivotally mounted between the two adjacent bearings 31 is a'gear box 38containing .the bevel gearing 32, 33. `This gearbox may be .pivoted bymeansvof trunnions in thetwo adjacent bearings 31.

, The shaft 34 is provided with end portions v39 which' can beenga'gedby aremovable cr'ank 40 so that the rotatable strut member' 30 vmay beoperated from either side of the appliance to extend the strut. 1

Normally the strut memberl 30 'rotates Yand the strut member 28 doesnotfrotate but movesaxially in relation to the member 3U to extend thestrut. When the head 3| of the strut member3|| comes into contact withthe end of the nut 29, furtherv rotation of the strut memberI 30 alsodrives the strut member 28 causing' it to turn in y the block 21 andthus continue the extension of the strut until the position shown inFigure 4 is reached.

The member 20 of the cradle is used to carry the primary tube 4| of theappliance. The member 20 is provided with a pair of seatings,42 engagedby the tube 4| and the tube is secured by external straps attached tothe seatingsf u At its -lower Aend tlie'tube is provided with an inletfitting 44 having a shank 45 to which a hose may be attached. Preferablythe hose is provided With its own stop valve ,so that theY flow ofliquid pressure may be controlled thereby.J

The fitting 44 is provided `with a valve seat 46j on which operates anon-return'valve 41 the stem of which is provided with a shock absorbingspring48.

'I'he pressure of the incoming liquid open.sthe valve and the valveprevents any back flow ofY liquid. y -The tubi-14| can beta lengthofstandard con-4 struction tube andit has welded toits lower end aflangev 49 Whig-.his bolted to Ttheiiangeill of the inlet fittingAtyvthsuitable' Vpacking intervening. At its outer `endthe tube .4| hasa iian'ge 5| welded to it and'it' provided with two stuing boitvmembers'f, 53..,whichcan be drawn together by means ofbolts 54. 1 y .2 L

The bolts 15.4.. carryfnutsfiti wlfiich are used to securethe.{stu'liingr` bogelenent 5g-.to the flange 4| with-suitableintervening packing. stumng. boxfelemenu 52 is provided witha Skil-ttlhaving two Yashaped notches, 5l.A i

I iurther, theprimarytube 4| is provided with two groups 58 and 59 ofopenings which are placedbetween two rings 60 ,secured to its extexficr:andwsecured to the peripheries of the rings 60` is Aa, sleeve; 6|, thespace Withinl this sleeve forming part of the transfer passage; of thepri` mary tube.

; Thesecondary,tube-is` yshrnavn yat 62 and at its innerenddt is-ttedwith apiston |53V engaging theginternal wall of the tube4l. `'l'hepiston G3 may be made of metaland one side of-fit 64 is of cupi-like;construction'receivingthe end of the secondary tube 62 is provided witha group of TheY exterior of. the secondary tube hasxed to it collar 8BonV whicharea pair of projections 69 adaptedV to 'co-operate with thenotches 5l when the secondary tubeA isi extended.

Theiappliance maybe provided with: a. dischargedevice 'Il or otherdischarge'oriflce which maybe 1 of any `.known construction. Ifthe`.appliance comprises only the primary and secondary tubesthen theldischargev device Illimaybe secured to the `outer end ofthesecondaryftube but in the construction shown there is athird tube andthedischarge device is applied toythe outer end thereof. i -f As thereis athrd tube in the construction i1- be drawn together by means ofbolts T8 provided with nuts 8|] so that the element 'l1 can be bolted tothe flange 8| welded to the end of the secondary tube.

Further, the secondary tube is also provided with two groups of openingswhich correspond to the openings 58 and 59 of the primary tube. Thegroups of openings in the secondary tube are shown at 'l2 and 'I3respectively and they are enclosed by a sleeve 'i4 secured to theperipheries :of two rings l5 and IG secured to the exterior of thesecondary tube.

The inner'end of the third tube 'il is provided with a pistonv82 whichis constructed similarly to AAcn lthe piston E3nbut diiers from it inthat it is 'provided witha small hole 83.

The purpose of providing this hole is to allow the liquid in thethirdtube 'ii to drain into the secondary tube when it is desired toallow the appliance to contract. If this hole 83 were not provided itwould benecessary to provide other means for draining away the liquid inthe third tube. p

The primary tube is provided with a primary drain pipe 8d, having a cock85 and a secondary drain pipe d having a drain cock 3l. The provision ofthe. secondary drain pipe and cock is necessary vbecause there is noopening in the piston E3. 4

The third tube 'H isY provided with a collar 83 having projections 89which co-operate with the notches Si) in the skirt 9| of the stufiingbox element T1 on the end of the secondary tube thus preventing thethird tube from turning on its own axis when extended. n

The third tube '1| is, of course, guided and supported in thesecondarytube 62 by the piston 32 and the s tuhng box elements 'l1 and13.

The three telescopic tubes are moved and retained in their extendedposition by the water pressure entering at 45, the pressure acting onthe underside of the piston 63 and moving it into the position shown inFigure 6. The liquid then iiows'through the ports 58 and the transferpasage within the sleeve 6| and the ports GT into the secondary tube andacts upon the underside of the piston 32 causing it to slide outwardlyuntil the ports 92 in the third tube receive the liquid from thetransfer ports 13 in the secondary tube. The liquid then passesupwardlyalong the third tube H until it reaches` the discharge device 1d.` Y. yi

When it is desired to contract the apparatus the stop valve associatedwith the hose is closed and thedrain cocks 854 and 87 are opened.

A After it `has beenv contracted the apparatus canbe lowered on theVvehicle'by operating one lustra'ted, the secondary tube at its outer endis provided withistulng boxl elements Vwhich are similar to thosedescribed in'conne'ction with the outer end of the primary tube and areyshown at' lfand 18. "These stuffing box 'elements can What I claim thenis:

l. Aliquid discharge appliance comprising a plurality of4 telescopicallyextensible tubes, ncluding a; primary tubehaving a liquid'inietconnectien; a non-return valve and a discharge cock, a secondary tubeslidably mounted in the primary' tube, a pistonon the end of thesecondary tube Within the primary tube and engaging the Walloftheprimary tube, and a stop for limiting outward sliding movement of thesecondary tube dueto pressure of liquid in the primary tube acting onthe piston, said primary tube having a transfer port uncovered by thepiston when the secondary tube is fully extended, said transfer portbeing formed by providing at least two axially spaced openings inthewall of the primary tube, avpair of rings on the exterior of the laamxraY 3 said tube, one ring beingxed thereto at one side of both openings,and the other ring being fixed thereto at the opposite side of bothopenings, a sleeve secured to the peripheries of the two rings, saidsecondary tube having'a liquid inlet port in its side, said transferport communicating with said liquid inlet port when the secondary tubeis fully extended so that liquid pressure on the piston then keeps thesecondary tube fully extended and liquid then flows through the transferport and liquidinlet port into the secondary tube, said secondary tubehaving a liquid discharge orice.

2. A yliquid discharge appliance comprising a plurality oftelescopically extensible tubes, including a primary tube having aliquid inlet 4 connection, a non-return valve and a discharge 170 mentof the secondary tube, a skirt on the stuffing box, and an inclinedsided projection on the collar and a correspondingly shaped notch in theskirt of the stung box for positioning the secondary tube angularlyaround its axis when 15 fully extended. f

` FREDERICK ALAN CAMPBELL.

